【作者】 郭建卿；

【导师】 马念杰；

【作者基本信息】 中国矿业大学（北京） ， 采矿工程， 2010， 博士

【摘要】 冲击地压是制约煤矿安全高效生产的主要灾害之一,而冲击地压发生的机理与采掘过程密切相关。本文采用实验室试验、DYNA-2D和Flac3D数值模拟和理论分析等方法,结合现场工程实践,对掘进工作面采动过程中应力场分布特征与诱发冲击地压的关系、液固耦合和不耦合爆破作用过程及致裂弱化岩体解除工作面的压力集中现象进行了深入系统的研究,建立了基于岩体原生微观裂隙的致裂破断模型,提出了掘进头前方0—3m区域内形成非均匀薄壁应力的观点。通过实验研究液固耦合和不耦合爆破对孔壁的不同作用荷载,从而产生不同的致裂弱化区。应用DYAN 2D模拟研究液固耦合和不耦合爆破应力应变演化的基本特征；应用FLAC₃D模拟研究了采动影响下,围岩内应力场的变化特征,不同爆破方式致裂弱化后应力集中区的转移规律。研制了液固耦合爆破封孔装置与注水工艺,建立了掘进工作面冲击地压预测预报系统,实现了对冲击地压的实时监测。上述结果在平煤十二矿三水平皮带下山防治冲击地压中应用,取得了良好的社会经济效益。更多还原

【Abstract】 Rock burst is one of the coal mine disaster that restrict the high efficiency production. The mechanism of rock burst is closely related with the mining process. By use of laboratory tests, numerical simulation by DYNA-2D and FLAC3D, theoretical analysis and combined with the engineering practice, the relationship between stress distribution and rock burst during gateroad driving, the process of solid-liquid coupling blasting and conventional blasting and destressed of stress concentration was studied. The broken model based on initial fissure was established and the viewpoint which exist non-uniform thin-wall stress area 0-3m in front of excavation was put forward. The different load on hole of solid-liquid coupling blasting and conventional blasting make different crack weakening area by laboratory test. The basic characteristics of stress variation of solid-liquid coupling blasting and conventional blasting were simulated by DYNA-2D. The stress field in surrounding rock and stress concentration area variation rules under different blasting methods was simulared by use of FLAC3D. The seal device of solid-liquid coupling blasting and water injection technology was developed. The rock burst forecast system of gateroad driving was developed and it can monitor the rock burst in real-time. The results was used to prevent the rock burst in No.12 coal mine of PingMei Group and the better social and economic benefits restrict was achieved.更多还原